Most of Coloradoâ€™s lodgepole pine trees stand to be dead within the next 5 years. In 1996, a bark beetle infestation was detected, and last year it spread over 500,000 acres more than previous years. Federal forestry officials say that this brings the total count of affected acres to 1.5 million.

BOSTON, Nov. 13 /PRNewswire/ -- Christmas just isn't Christmas without a freshly-cut tree, meticulously decorated and lights aglow, with presents laid out below and the fragrance of fresh pine needles in the air.

Biologists studying a lethal blight of lodgepole pines in northwestern British Columbia present strong evidence in the September issue of BioScience that climate change is to blame for the outbreak. The blight, caused by the fungus Dothistroma septosporum, causes trees to lose their needles and, in the case of the British Columbia outbreak, eventually die. D. septosporum has long been recognized as a pathogen of pines, but although it is considered a serious disease of exotic plantations in...

A Duke University study has found that maturing stands of pines exposed to the higher levels of carbon dioxide expected by mid-century produce more needles than those absorbing today's levels of the gas, even under drought conditions. However, the study also found that lack of soil nutrients may impose limitations in many forests.

The mountain views along Red Stone Road suggest early autumn, with splashes of red, orange and rusty brown dotting the green hillsides above the homes and condominiums of this Colorado resort town. But this is summer and the colors represent dead pine needles on hundreds of pine trees that have been killed by beetles.

Western white pine (Pinus monticola) grows in the mountains of the western United States and Canada growing in the Rocky Mountains, The Sierra Nevada, the Cascade Range, as well as growing along the Coast. The pine is also known as silver pine or Idaho pine as it is that states tree.
The Western White pine grows at different elevations depending on its region. In Canada it is found growing from sea level up to 3,940 feet and in Washington state it grows up to 6,070 feet above sea level. In...

Smooth-bark Mexican pine (Pinus pseudostrobus) grows near Northern El Salvador, the highlands in Guatemala, and West Honduras and central Mexico. This tree has also been introduced to New Zealand. Fifteen mature Mexican pines can be found in the Palo Verde County Park located in Imperial County, CA.
This tree grows from heights of 65.6 feet to 131.2 feet and occasionally may reach 147.6 feet. It can be found growing from 4265 feet in elevation to 10,660 feet; although, this tree has done...

Montezuma pine (Pinus montezumae) is native to Mexico and Central America and grows in the mountain ranges. This tree is known as ocote by the locals of Mexico. This tree has been planted successfully at mid altitudes in South Africa and Queensland, Australia, and at high altitudes in Kenya, Malawi, Botswana, Zimbabwe, and Bolivia. Trees planted in New Zealand and New South Wales, Australia have done well at sea level.
The Montezuma pine grows at 6,562-10,500 feet above sea level where...

Macedonian Pine (Pinus peuce) is native to Macedonia, Bulgaria, Albania, Montenegro, Kosovo, southwest Serbia, as well as the extreme north of Greece. This pine has been neutralized and grows in Eastern Finland.
This pine grows best at altitudes between 3,281feet and 7,218 feet with a few growing as low as 1,969 feet and as high as 7,546 feet. This pine tolerates shade as well as extreme cold, and grows in rocky soils that are acidic and poor in nutrients.
This tree grows to heights...

Limber Pine (Pinus flexilis) grows in the sub-alpine mountainous regions of the Western United States, Mexico, and Canada, with a small cropping found in the Black Hills in South Dakota. One of the oldest trees to be documented is found in Eagle Cap Wilderness in Oregon and is reported to be 2000 years old. This pine is also known as the Southwestern White Pine and Rocky Mountain White Pine.
The Limber pine is drought tolerant and grows at high elevations (5000-12,000 feet) marking the...

A pivoted catch designed to fall into a notch on a ratchet wheel so as to allow movement in only one direction (e.g. on a windlass or in a clock mechanism), or alternatively to move the wheel in one direction.